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Finding the Fourth Proportional to 247,255.20, 370,861.20 and 81,043.20

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Solution

The fourth proportional to 247,255.20, 370,861.20 and 81,043.20 is: 121,557.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,255.20 : 370,861.20 = 81,043.20 : x
  2. Step 2: Convert to fraction form
    247,255.20/370,861.20 = 81,043.20/x
  3. Step 3: Cross multiply
    247,255.20x = 370,861.20 × 81,043.20
  4. Step 4: Simplify right side
    247,255.20x = 30,055,778,403.84
  5. Step 5: Solve for x
    x = 30,055,778,403.84/247,255.20
  6. Step 6: Final answer
    x = 121,557.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.